Git plumbing command to find out which files have been changed in a given revision

Question

I've created a hook that sends out notification emails when a developer pushes an update to his shared repository. This email includes a list of changed files, example:

A   __classes/Page/Activity.php
M   __config/Scheme.php

that I generate using the following bit of bash:

$(git diff "$newrev"^ "$newrev" --name-status)

This works fine. However, I'm trying to port all this now to the well-known post-receive-email hook. This hook does have a hooks.showrev configuration directive, but this I think this only allows for the revision number (%s) to be used once in the command. So this doesn't work:

showrev = "git diff %s^ %s --name-status"

There must be a 'plumbing' command that does just this. Can anyone point me in the right direction? :)

Answer 1

How about using the following?

showrev = "git show --name-status --pretty=format: %s"

git show is porcelain rather than plumbing, but I think this is what you want.

Answer 2

git whatchanged -1 <rev> might be a good starting point, and has a number of additional options for massaging the output format. Not sure you can get exactly the format you quoted above, but you should be able to get something comparable.